EP3146535B1 - Passage pour conduites - Google Patents

Passage pour conduites Download PDF

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Publication number
EP3146535B1
EP3146535B1 EP15722185.4A EP15722185A EP3146535B1 EP 3146535 B1 EP3146535 B1 EP 3146535B1 EP 15722185 A EP15722185 A EP 15722185A EP 3146535 B1 EP3146535 B1 EP 3146535B1
Authority
EP
European Patent Office
Prior art keywords
force
insulating body
force transmission
housing
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15722185.4A
Other languages
German (de)
English (en)
Other versions
EP3146535A1 (fr
Inventor
Uwe Bruhns
Melanie DANIEL
Bernd Köhler
Robert Meyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KSB SE and Co KGaA
Original Assignee
KSB SE and Co KGaA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KSB SE and Co KGaA filed Critical KSB SE and Co KGaA
Publication of EP3146535A1 publication Critical patent/EP3146535A1/fr
Application granted granted Critical
Publication of EP3146535B1 publication Critical patent/EP3146535B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0693—Details or arrangements of the wiring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials especially adapted for liquid pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/132—Submersible electric motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Definitions

  • the invention relates to a device with a pump that is driven by a wet rotor motor and has a housing which comprises a bushing arrangement for supplying power to the wet rotor motor, the bushing arrangement having a line element and an integrally formed insulating body and comprising a holding element.
  • Such devices are used, for example, in the reactor pressure vessel of a boiling water reactor, with a plug-in pump ensuring that the coolant is circulated without external pipelines.
  • the housing parts form the pressure envelope, which delimits an interior space from the surrounding atmosphere.
  • the push envelope is usually designed for a very high system pressure.
  • the device comprises a pump which is driven by a liquid-filled motor.
  • the motor has a housing which is part of the pressure envelope.
  • the invention relates to a device with a pump which is driven by a wet rotor motor.
  • wet rotor motors a distinction is made between designs with dry and wet winding of the stator. If the stator winding is dry, one speaks of a canned motor. A wet stator winding is referred to as a wet motor.
  • the wet engine is completely filled with liquid. With the The rotor and its bearing, the stator and the winding including the supply line connections are also in the liquid. The prerequisite is a waterproof and pressure-tight insulation of all live parts.
  • the wet motor is used in particular as a drive motor for glandless circulating pumps in power plants.
  • the lead-through arrangement comprises two insulating bodies, an outer insulating body made of ceramic and an inner insulating body made of hard rubber.
  • the DE 31 03 299 A1 describes a device with a glandless circulation pump driven by an electric motor.
  • the housing designed as a pressure sleeve, has a feed-through arrangement for supplying power to the motor.
  • the bushing arrangement comprises a line element designed as a conductor connection bolt and two insulating bodies, an inner ceramic insulating body and an outer insulating support body.
  • the insulation is constructed in two parts. It consists of an inner insulating body and an outer insulating body.
  • the inner insulating body is the pressure-bearing part.
  • An outer insulating body is arranged over the inner insulating body.
  • both insulating bodies require a very long overlap in order to achieve the necessary creepage distances. This increases the installation space.
  • Metal rings are used to protect against high loads. These require additional sealing points and can be heated by eddy currents.
  • the JP S55 15968 U describes an insulation element attached to a cable 7, which is passed through a cable lead-through opening of an electrical device main body.
  • a flange-like projection is formed in a section of the insulation element which rests against a shoulder formed in the main body of the device and is fixed by means of a fastening sleeve.
  • the object of the invention is to provide a device with a pump driven by a wet rotor motor, which ensures a high degree of safety and takes up as little space as possible. As few sealing points as possible should be required.
  • the leadthrough arrangement comprises at least one force transmission element arranged between the holding element and the housing, on which the holding element fixed by fastening elements on the housing exerts a force which the force transmission element transmits to the housing and / or the insulating body, the force transmission element being fully integrated in the insulating body and consists of a high-strength fiber material embedded in a matrix to form a mechanical reinforcement.
  • the force transmission element is preferably a mechanical reinforcement element made of an electrically non-conductive and / or non-magnetic material. This avoids eddy current losses and the associated heating.
  • the holding element acts on the force transmission element and presses it in the direction of the housing.
  • the insulating body surrounds the line element that supplies the wet rotor motor with power.
  • the force transmission element is in operative connection with the insulating body and ensures that the insulating body is fixed on the housing.
  • the device according to the invention enables a separation of tasks between insulation and power transmission, so that only one insulating body is required in the device according to the invention. This significantly reduces the installation space. In addition, the required sealing surfaces are reduced and secondary seals are avoided.
  • the line element preferably has a thickening at the end directed towards the inside of the housing. It proves to be advantageous if the insulating body is braced between the fastening element and the thickening of the line element. In a particularly advantageous embodiment of the invention, the thickening is frustoconical.
  • the power transmission element is pressed against the housing. This fixes the insulating body in the lead-through arrangement.
  • the force transmission element and the insulating body are in operative connection with one another.
  • the force transmission element has an area which protrudes into a feed-through opening in the housing. In this area, the force transmission element has an outer diameter which is somewhat smaller than the inner diameter of the opening in the housing. Sealing elements are preferably arranged in the area between the force transmission element and the motor housing.
  • the force transmission element has an area which forms a stop for the feed-through opening in the housing.
  • the force transmission element has both an area that protrudes into the lead-through opening in the housing and an area that is arranged outside the lead-through opening.
  • the force transmission element is designed like a ring and encloses an area through which the line element passes.
  • the smallest inside diameter of this area is preferably smaller than the largest outside diameter of the thickening of the line element. If the insulating body breaks, the high pressure in the motor housing pushes the line element "outwards". In this variant, the force transmission element forms a stop for the thickening of the line element.
  • This construction secures the line element against a bullet-like leakage from the housing and prevents massive leakage along the line element. Leakage is preferably prevented in the normal state by sealing elements.
  • the annular force transmission element is designed in the shape of a truncated cone and has an opening in the middle.
  • the base of the ring-like frustoconical force transmission element faces the housing.
  • the top surface faces the outside.
  • the lateral surface faces the holding element. If the fastening elements are tightened on the holding element, the holding element acts on the outer surface of the force transmission element.
  • the holding element preferably has a central frustoconical opening.
  • the inclined inner surfaces of the holding element act on the inclined outer surfaces of the force transmission element.
  • the holding element braces the force transmission element against the housing.
  • Figure 1 shows a device designed as a motor-pump unit with a wet rotor motor 1.
  • a motor housing 2 forms part of the pressure envelope.
  • the inside of the wet rotor motor 1 is filled with liquid.
  • a cooling system 3 is provided to dissipate the electrical power loss.
  • the wet rotor motor 1 comprises radial and axial bearings.
  • the driving force of the motor 1 acts on a shaft train 5 and thus transmits a torque to a pump 4.
  • the pump 4 comprises a pump housing 6 in which an impeller 7 and a guide device 8 are arranged.
  • the pump housing 6 is closed by a cover element 9 and connected to the motor housing 2 via at least one tie rod 10.
  • flywheel 11 Within the cover element 9, which is constructed in several parts in the exemplary embodiment, there is a flywheel 11, the moment of inertia of which ensures further rotation of the shaft train 5 in the event of a power failure.
  • the motor housing 2 and the pump housing 6 together with the cover element 9 form the pressure envelope. This is designed for a high system pressure.
  • the unit is designed for a drive power greater than 600 kW.
  • the wet rotor motor 1 is designed as a wet motor.
  • the wet rotor motor 1 is completely filled with liquid. With the rotor and its bearing, the stator and the winding including the supply line connections are also in the liquid.
  • a feed-through arrangement 12 is provided in the motor housing 2 for supplying power to the wet rotor motor 1.
  • FIG. 2 shows a perspective sectional view of a leadthrough arrangement 12.
  • the motor housing 2 has a leadthrough opening 13 for this purpose.
  • the feed-through opening 13 is made as a bore in the motor housing 2.
  • a line element 14 is used to supply power to the wet rotor motor 1.
  • the line element 14 is designed as a cylindrical bolt.
  • An insulating body 15 separates the line element 14 from the motor housing 2.
  • the line element 14 has a thickening 16.
  • the thickening 16 is designed like a truncated cone and faces the inside with the top surface.
  • a cylindrical section of the line element 14 adjoins the base area of the frustoconical thickening 16.
  • the line element 14 and the insulating body 15 are braced against one another.
  • the line element 14 has an external thread onto which the component 17 is screwed.
  • a force is exerted on the insulating body 13 via a disk 18 and presses it against the thickening 16 of the line element 14.
  • the insulating body 15 rests against a contact surface 19 of the line element 14, which is formed by the thickening 16 of the line element 15.
  • the leadthrough arrangement 12 has a force transmission element 20.
  • the force transmission element 20 is designed as an annular truncated cone body.
  • the force transmission element 20 is completely integrated in the insulating body 15.
  • the leadthrough arrangement 12 comprises a holding element 21 which is fixed to the motor housing 2 by fastening elements 22 which are designed as screws.
  • the holding element 21 is designed as an annular disc with a frustoconical central opening. Bores, in which the fastening elements 22 are arranged, are introduced along the circumference of the disk-like holding element 21. Bores 23 which have an internal thread are made in the motor housing 2.
  • the fastening elements 22 have a corresponding external thread.
  • the line element 14 has an opening 24 in the area of the thickening 16.
  • a conductor 25 of the wet rotor motor 1 is arranged in this opening 24.
  • the line element 14 and the conductor 25 are surrounded by insulation 26, which in the exemplary embodiment is designed as a shrink tube and / or insulating tape.
  • the conductor 25 is a current-carrying cable from the winding of the wet rotor motor 1.
  • the insulating body 15 is made in one piece and has an integral force transmission element 20.
  • the force transmission element 20 is a mechanical reinforcement which brings about the introduction of force into the pressure envelope.
  • the inner diameter of the ring-shaped force transmission element 20 is smaller than the outer diameter of the thickening 16 of the line element 14. If the insulating body 15 breaks, the line element 14 is secured against a bullet-like exit from the motor housing 2 by the force transmission element 20, thereby preventing massive leakage .
  • the force transmission element 20 can consist of a high-strength fiber material which is embedded in a matrix. In this way a mechanical reinforcement is formed.
  • the force transmission element 20 is inserted as an insert ring during the manufacture of the insulating body 15 and then, if necessary, encapsulated.
  • the force transmission element 20 can be introduced into a space provided for this purpose by winding and / or gluing.
  • FIG 3 shows an excerpt from Figure 2 shown variant.
  • the ring-shaped force transmission element 20 has an outer jacket surface 27 which runs parallel to a surface 28 of the inner opening of the holding element 21.
  • the surface 28 is an inner conical surface of the holding element 21.
  • the ring-like force transmission element 20 has an end face 29 which is directed towards the motor housing 2 or towards the feed-through opening 13. Furthermore, the force transmission element 20 has an end face 30 which is directed outwards or towards the component 17.
  • Figure 4 shows a variant, which is not the subject of the claimed invention, in which the force transmission element 20 protrudes at least partially into the feed-through opening 13.
  • the force transmission element 20 has a circumferential groove 31 in which an annular sealing element 32 is arranged.
  • the force transmission element 20 has an extension 33 which is surrounded by an insulation layer 26.
  • the extension 33 is sleeve-shaped.
  • Figure 5 shows a variant, which is not the subject of the claimed invention, in which the force transmission element 20 is designed as an annular cylindrical disk or as a sleeve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Claims (8)

  1. Dispositif muni d'une pompe (4), qui est entraînée par un moteur à rotor noyé (1) et comporte un boîtier (2), qui comprend un agencement de passage (12) pour alimenter en courant le moteur à rotor noyé (1), l'agencement de passage (12) comportant un élément de conduite (14) et un corps isolant configuré d'un seul tenant (15), et comprenant un élément de retenue (21),
    caractérisé en ce que
    l'agencement de passage (12) comprend au moins un élément de transmission de force (20) agencé entre l'élément de retenue (21) et le boîtier (2), sur lequel l'élément de retenue (21) fixé par des éléments de fixation (22) sur le boîtier (2) exerce une force, que l'élément de transmission de force (20) transmet au boîtier (2) et/ou au corps isolant (15), l'élément de transmission de force (20) étant entièrement intégré dans le corps isolant (15) et, pour la formation d'un renforcement mécanique, étant constitué par un matériau fibreux hautement résistant incorporé dans une matrice.
  2. Dispositif selon la revendication 1, caractérisé en ce que l'élément de retenue (21) comprend une ouverture de forme tronconique.
  3. Dispositif selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que le corps isolant (15) est agencé entre un composant (17) et un épaississement (16) de l'élément de conduite (14).
  4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'élément de transmission de force (20) comprend une zone qui est en saillie dans une ouverture de passage (13) dans le boîtier (2).
  5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'élément de transmission de force (20) comprend une zone (29), qui forme une butée pour une ouverture de passage (13) dans le boîtier (2).
  6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'élément de transmission de force (20) entoure une zone pour le passage de l'élément de conduite (14).
  7. Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'élément de transmission de force (20) comprend une ouverture intérieure, qui est inférieure à un épaississement (16) de l'élément de conduite (14).
  8. Dispositif selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'élément de transmission de force (20) est configuré sous forme tronconique.
EP15722185.4A 2014-05-20 2015-05-12 Passage pour conduites Active EP3146535B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014209517.4A DE102014209517A1 (de) 2014-05-20 2014-05-20 Leitungsdurchführung
PCT/EP2015/060406 WO2015176991A1 (fr) 2014-05-20 2015-05-12 Passage pour conduites

Publications (2)

Publication Number Publication Date
EP3146535A1 EP3146535A1 (fr) 2017-03-29
EP3146535B1 true EP3146535B1 (fr) 2020-11-18

Family

ID=53175507

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15722185.4A Active EP3146535B1 (fr) 2014-05-20 2015-05-12 Passage pour conduites

Country Status (3)

Country Link
EP (1) EP3146535B1 (fr)
DE (1) DE102014209517A1 (fr)
WO (1) WO2015176991A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024223756A1 (fr) * 2023-04-28 2024-10-31 KSB SE & Co. KGaA Bague de câble
WO2024223748A1 (fr) * 2023-04-28 2024-10-31 KSB SE & Co. KGaA Bague de câble

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043903A (en) * 1958-05-08 1962-07-10 Gen Electric Hydrostatic lead seal and method of making same
GB1076936A (en) * 1963-10-26 1967-07-26 Gutehoffnungshuette Sterkrade Improvements in or relating to lead-in arrangements
GB2003334A (en) * 1977-08-29 1979-03-07 Carrier Corp A terminal block and method of manufacturing
JPS5515968U (fr) * 1978-07-18 1980-01-31
DE3103299C2 (de) 1981-01-31 1985-04-04 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Abdichtung für Leitungsdurchführungen
DE3100863C2 (de) 1981-01-14 1982-11-18 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Leitungsabdichtung
JPS60234444A (ja) * 1984-05-04 1985-11-21 Toshiba Corp 水封電気機器の口出装置
JPS6271451A (ja) * 1985-09-25 1987-04-02 Hitachi Ltd 高圧液体封入機器の口出し部接続装置
JPS6281455U (fr) * 1985-11-11 1987-05-25
US7038339B2 (en) * 2004-03-31 2006-05-02 Sauer-Danfoss Inc. Method and means of sealing an electrical conductor through the housing of a fluid filled motor
DE102005036347A1 (de) 2005-07-29 2007-02-01 Ksb Aktiengesellschaft Elektromotor mit koaxial zugeordneter Pumpe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024223756A1 (fr) * 2023-04-28 2024-10-31 KSB SE & Co. KGaA Bague de câble
WO2024223748A1 (fr) * 2023-04-28 2024-10-31 KSB SE & Co. KGaA Bague de câble

Also Published As

Publication number Publication date
DE102014209517A1 (de) 2015-11-26
EP3146535A1 (fr) 2017-03-29
WO2015176991A1 (fr) 2015-11-26

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